Several news outlets briefly reported the episode, mentioning that a Honduran official said the United States Drug Enforcement Administration had provided support. But none of the reports included a striking detail: that support consisted of an elite detachment of military-trained D.E.A. special agents who joined in the shootout, according to a person familiar with the episode.

The D.E.A. now has five commando-style squads it has been quietly deploying for the past several years to Western Hemisphere nations